The modular ratio 'm' of a concrete whose permissible compressive stress is 'C' may be obtained from the equation _____

A

m = $$\frac{700}{3C}$$

B

m = $$\frac{1400}{3C}$$

C

m = $$\frac{2800}{3C}$$

D

m = $$\frac{3500}{3C}$$